Improvement in buckets for chain-pumps



A. W. NEW HALL.

Buckets for Chain-Pu mps.

Patented Oct. 13,1874.

fizve'lzfaz" THE GRAFBIC C0- BNOYDLITH UNITED STATES PATENT OFFICE.

ABNER W. NEWHALL, OF HORSEHEADS, NEW YORK.

IMPROVEMENT IN BUCKETS FOR CHAIN-PUMPS.

Specification forming part of Letters Patent No. 155,965, dated October13,1874; application filed May 1, 1874.

To all whom it may concern:

Be it known that I, ABNER W. NEWHALL, of Horseheads, in the county ofOhemung and State of New York, have invented a new and usefulImprovement in ExpansionBuckets for Chain-Pumps; and I do hereby declarethat the following is afull, clear, and exact description of the same,reference being had to the annexed drawings making part of thisspecification, in which Figure 1 is a perspective view, and Fig. 2 avertical section.

My invention relates to that class of solid elastic buckets or valvesfor chain-pumps in which the buckets are made of india-rubber and have afeather-edge around the base,whi.ch is compressed, in drawing it througha tube, so as to make a tight joint and lift the water above the bucket,at the same time forming a vacuum below it. My improvement consists ingiving a polygonal form to the bucket, the sides of which are soproportioned that as the bucket is drawn through the tube itsfeatheredge shall not be compressed so as to form a circle, like thehemispherical buckets heretofore known, but retains enough of itspolygonal form to leave narrow spaces between the edges of the bucket,midway between the angles and the surface of the tube.

By this construction it becomes unnecessary to introduce leak-holesthrough the valve for the escape of the water when the pump is stopped.

Another improvement included in this application is applicable to roundas well as to the polygonal edged buckets, and has for its object theexpansion of the bucket to make it fit the tube as it becomes worn fromuse. This is done by forming a hole through the center of the solidindia-rubber bucket, into which a conical or tapering pin may be driven,to expand the bucket and set out its edges suffi- Two or more holes maybe used for the same purpose, as when pins are driven into these theywill expand the rubber on their respective sides to meet all therequirements in practical use.

In the annexed drawings, A is the rim of a valve made of india-rubber,being in form a frustum of an eight-sided pyramid, connected in onepiece with a central cylindrical portion, A, projecting above and below.Through the center is a hole, B, and I have also shown on each sideother holes, B B, equidistant from the center.

When the edge of the rim A becomes worn, so as to fit too loosely in thepipe," a tapering pin, 0, may be driven into the central hole B, therebyexpanding the rim to an extent equal to the diameter of the pin. Otherpins may be in like manner driven into the holes B B.

D is a link cast into the bucket, to which the chain is connected.

I am aware that holes'have been made in the rim of india-rubbcr valvesof this class for the purpose of allowing the water above the valve torun back into the well. I do not claim, therefore, such valvesconstructed with vent-holes; but my invention is distinguished fromthose before known in this, that the holes are placed at or around thecenter of the bucket, and tapering pins are used in combinationtherewith to expand the valves.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A valve for a chain-pump, made of an elastic material, the rim A ofwhich is the frustum of a polygonal pyramid, substantially as set forth.

2. In combination with an elastic valve havscribing witnesses.

A. W. NEWHALL. Witnesses:

. R. MASON,

A. RUPPERT.

